Top surface of a floor tile



FIG. 1 is an isometric view of my design, the sides of the tile being shown in broken line as environmental structure;

FIG. 2 is a plan view of my design, the sides of the tile being shown in broken line as environmental structure; and,

FIG. 3 is a side elevation view, the bottom and sides of the tile being shown in broken line as environmental structure.

The broken line showing of the environment is for illustrative purposes only and forms no part of the claimed design. 

CLAIM The ornamental design for a top surface of a floor tile, as shown and described. 